Coffee urn



Patented Apr. 29,192d.

. UNITED TATES I IiOUIS K. SGHWALL, OF CHICAGO, ILLINOIS.

' COFFEE URN.

' Application filed December 31, 1823. Serial No. 683,622.

I To all whoin it may-concern:

ticularly in the largger Be it known that I, Loms K- SGHWALL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Coffee Urns, of which the following is a specification.

My invention relates to coffee urns, par- I sizes used for hotel and. restaurant wor One of theobjects of the invention is to provide apparatus so constructed that it will avoid the need of pouring hot water in through the top of the urn. In many of the coffee urns now in use it is necessary for an attendant to climb upon a ladder or stool and raise a bucket of hot water over his head in order to operate the device, which is both inconvenient and dangerous; It is my purpose to provide a construction into which the heated water may be introduced with proper distribution v by merely manipulating one or more valves.

Another object of the invention is to provide apparatus in which the water may be heating for a fresh batch of coffee at the same time thatthe made coffee is being dispensed to customers; Another object is to provide means within the urn itself for measuring the quantity of hot water tobe allotted to the charge of ground coffee. Still another object is to provide an urn so constructed that the spent cofi'ee grounds may be removed and a fresh supply of ground coffee introduced from the slde' of the apparatus instead of through the top thereof as has been the common practice heretofore. In addition to convenience this makes it possible to remove the spent coffee grounds and introduce a fresh supply while the water is being heated fora fresh batch. Still another object is to provide a source of hot water from which tea may be made and at the same time utilize this source for maintaining the liquid cofiee at or near the boiling temperature. In this connection it is my purpose to provides. water heater and a circulatory system by which the last mentloned source of hot water and in fact all ofthe liquid in the apparatus may be kept at or near the boilin temperature.

I A further object is to provide a heater which is intimately connected with but is disconnectible as a unit from the main body of the urn so that if as a result of'careless operation the heater should go dry and-burn out, a new heater'can' be substituted without 18. This water disarranging the assembly of the chief parts of the urn. p

I accomplish my objects by the mechanism illustrated in the accompanying drawings,

in which I Figure 1 is a front elevation of the complete apparatus, portions being broken away to reveal the internal construction.

. Figure 2 is a fragmentary detail show- 1ng in vertical section the construction of.

ment or chamber 10. Below'this floor is a spray compartment or chamber 12 which occupies a little less than another third of the height..

At the bottom of the spray, chamber, lugs 14 are secured to the inner wall of the easing and these support an annular flange 16 formed at the upper end of. a water jacket jacket extends nearly to the bottom of the casing where it has a drain 'plug 20. Within the water jacket is a reservoir 22 for holding the liquid cofi'ee. A spigot 24 leads out through the side of the casing from the coffee receptacle and a spigot 26 leads out from the water jacket. The coffee receptacle is soldered or otherwise fastened at its upperend to theupper end of the water jacket. 7 v The coffee grounds 28 are contained in a receptacle 30 which is cylindrical and open at the top. It is perforated at the bottom 32, this perforated bottom forming a support for a cheese cloth strainer 34 as shown in detail in Figure 2. Lu 36 project from the inner wall of receptac e- 30 a few inches from the bottom and these support a perforated plate 38. This holds the coffee evenly distributed and revents it from collecting to a greater de t in one part of the rece tacle than anot er. It also serves as a ba e or distributor for the water which issues from the-spray nozzle 40.

Lugs 42 extend from the sides of the coffee grounds receptacle 30 and serve to slightly ber 12 has a hinged heating chamber support it upon the throat oi the reservoir 22 which holds the liquid coffee. By preference the, outer diameter of-receptaclc 30 is p less than the inner diameter of the throat of the cofi'eereservoir', the purpose being to prevent water from collecting 'in the space surrounding the grounds receptacle 30. If water reaches th1s space'it will. drain down into the coffee reservoir.

The middle compartment or spray chamdoor 44 in front. This is of suflicient dimensions to permit, the

coffee grounds receptacle to be lifted-bodily out of the apparatus.

The apparatus is equipped with suitable liquid gauges. One of-these marked 46 is located at the upper compartment or heating chamber 10 and is so connected that itwill indicate the quantity of water therein.

Another gauge 48 is so connected as to in- I will now describe the heating and circulating system: A pipe 50 is connected with the city water supply and is provided with a valve 52. It has'a branch 54 which connects with the bottom of the water jacket 18. This branch is equipped with a valve 56. Above the branch 54 there is a connection 58 which leadsto the bottom of a water heater 60. This heater is here shown in the form ofa hollow cylindrical water receptacle the heat for which is appdied from a as burner 62. Gas from th1s burner is le in through the pipe 64. A branch 66 leads from pipe 50 to the bottom of the 10 and a pipe 68 leads from the upper end of the heater to the center of chamber 10 where it connects with the lower end ofv an upstanding distributor pipe 70. A pipe 72 leads from the lower port1on of the eating chamber 10 to a branch 74 which supplies water-for the spray 40 previously into this s ray branch is controlled by a hand valve ifi. Pipe 72 connects with a pipe 78 which leads through the side of the cas: ing to the'inside of the water jacket 18. Thus the hot water in the heating chamber 10 may flow either to the water jacket 18 or spray 40.

The spray so placed and designedthat grounds in the receptacle 30, thus causing all arts of the grounds to-be sub'eoted tothe caching action ofithe water rom the nozzle 40.

Operation: Let it be assumed that the apparatus is entirely empt .The operator wil close the valves 76 an open the valves 52 and 56. The consequence s that cold water from the source of supplywillflow into the system, filling the water jacket 18, the heater 60 and the heatin chamber 10. en the water has a; the dred level in the thence down throughthe pipe of the heater. apparatus has two water circuits arranged of the liquid eogee. within pipe 66 and in ing water to flow mentioned. The flow mamas chamber 10 the attendant will close the valve 52. For the 'sake of illustration let it be assumed that the o orator permits the water to flow until the amberlQcbntains 8..gals.

The burner 62 is now lighted and com' menceslo heat the water.

There .are now two completecirculatorysystems in opera- 'ti'o'n'. One 'systeni'orcircuit may be'traced as.

follows: from the topf'of theheater 60 through... pipes 68 T. and tofchamber '10,

the bottom of the heater. T e other circuit may be traced as follows: from the heater .60 to the chamber 10, thence down through 78 to the water jacket 18, thence 54 and 51 back .to the bottom,- It will be observed that the pipe 7 2, through pipes 66' and 58 to in arallel, the heater being commonto both, I

an the return duct beingin one case the the other the pi e 78.

The water is permitted to eat and circulate hr the manner described until it reaches the. boiling temperature whereupon the apparatus is so ready. for "making co At this or a previous. time a supply of ground cofiee 28 is placed in the bottom of the receptacle 30. The operator now-o ens the spray valve 76 which permits the 'oilout through the nozzle 40' and to be sprayed upon the coffee grounds. The water is caused to flow gradually so as to extract the flavor of the co so thoroughly and this is continued preferably until six of the eight gallons of water haveflowed down through the cofliee andcollected in the cofiee reservoir 22. The water is distributed so thoroughly from the nozzle 40 that when the- 6 gals. have passed through the coffee the essence has been'extracted from it. The liquid coffee is now within the reservoir 22 from which through the spigot 24..

There are at thistime .2 gals. of water remaining in the heating chamber 16 and this will be enough to'coverthamouth of the pipe68. Hence'the two'heating circuits are maintained, and the result is that the water in the heatingdacket 18 is kept at or near. boiling-temperature. This serves a double purpos efirst, to keep the cofiee in the reservo1r'22 hot, and'second, tofform a source 'froni'lwhich hot watermay .be drawn for making tea or cocoa. fl

In order to save time, especially in a busy restaurant, it is possible. in li y-apparatus to heat a fresh batch of water. at the same closed. This causes the heating p v u y be again filled to the maxiit may be drawn oil? as required 7 "time that the liquid cofiee is being drawn 1 from the reservoir. For this purpose the attemzlant eloses vvalve 5 6 and .opens' the valve 52, the spray valve'jfi having been mamas charge of co'dee grounds, thus preparing the latter to be more quickly and thoroughly acted upon when the spray valve 7 6 is again opened and hot water issues from the nozzle 40.

From the foregoing it will be seen that my apparatus may be quickly filled with water in the first instance, and that as soon as it is filled the water in it may be heated quickly and maintained at a high temperature in all parts. The liquid cofi'ee in the coffee reservoir may be kept I ot as long as desired and a supply of ho water for tea making it always on hand.

Another important characteristic is that while one batch of liquid coffee is being drawn off another batch of water may be heating, thus not only saving time for bringing the fresh batch of water up to boiling temperature butmaking it possible .in view of other characteristics of my apparatus to utilize the interim for removing .the spent coffee grounds and introducing a fresh charge. It will be noted that each batch of coffee is kept individual and there is no tendency for the operator to leave part of the old grounds in to be subjected a sec- 0nd time to the acti n of hot water. other words, when the operator has removed the coffee receptacle it is just as easy for him to remove the entire contents as it is to leave some of the old coffee in place. Hence the coffee is always made from fresh coffee grounds and there is no mixing of one batch of liquid coffee with the succeed ing one.

According to the illustrated design there are two separate water circuits, as explained, thus insuring uniform and thorough heating of the water throughout the apparatus. All-this is accomplished without any need on the part'of the operator to raise buckets of hot water to the topof the apparatus nor is there any danger connected with the operation of the apparatus, for practically everything is accomplished r nerely by the proper'manipulation of a few valves.

From the foregoing it will be evident that my apparatus as illustrated has three compartments or sections, one above the other, the upper for storage of hot water, the lower having a coffee reservoir and an. enclosing water jacket and the middle compartment having a receptacle for the ground cofiee together with a nozzle for spraying hot water onto it.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:.

1. A coffee urn having a receptacle forthe coiiee grounds, a reservoir below it for the liquid coffee, a heating chamber above the receptacle, means for heating the water in the chamber, a spray nozzle above the receptacle and a duct leading from the heating chamber to the spray nozzle for spraying water upon the coffee grounds.

2. A cofi'ee urn-having a heating chamber for supplying hot Water to the cofiee grounds, an external water heater, and 'pipe connections forming a circuit leading from the external heater to the heating chamber and from the heating chamber back to the heater whereby the water in, the heating chamber may be raised to and ket at a high temperature "from a source of cat ex- I ternal to the body of the urn.

3. A cofi'ee urn having a reservoir for the liquid cofi'ee, a water jacket surrounding it, an external water heater, and connections whereby hot water may flow from the upper portion of the heater to the water jacket and from the water jacket to the lower portion of the heater. I

4. A. coffee urn having a reservoir for the liquid coffee, said reservoir being open' at the top, a receptacle for the coffee grounds seating at the top of said reservoir, a nozzle for spraying hot water onto the coffee grounds, aheating chamber for water located above the spray, a pipe leading from said heating chamber to the spray nozzle for supplying hot water thereto, a water heater,

an pipe connections between the water heater and the heating chamber forming a water circuit whereby the water in the heating chamber may be raised to and kept at high temperature.

. 5. A cofl'ee urn having a reservoir for the liquid coffee, a water jacket surrounding it, a water heating chamber, a pi e leading from the water jacket to the c amber, a second pipe leading from the heating chamber to the Water jacket, and means for ing chamber, and the other end to the water jacket.

7.' A cofiee urn having a reservoir for the liquid coffee, a water jacket surrounding it,

a Water heating chamber, a water heater,

and pipe connections whereby the heaterand the water jacket are arranged in parallelcircuits to each other with respect to the water heating chamber.-

' of water supp 8. A cofiee urnhaving a reservoir for the liquid coffee, a water jacket therefor, a

water heater, a ipe leading from the source to the heater, a branch from said pipe leading to the water jacket, aheating chamber, a pipe leadin from the water jacket to the heating cham er, a pipe leading from the heating chamber to the water heater, a valve in the supply pipe and a valve in said branch. 1. w

9. A cofi'ee urn having a reservoir for the liquid coflee, a' water jacket therefor, a water heater, a pipe leading from the source of Water supply to the heater, a branch from said pipe leading to the water jacket, a heating chamber, a pi e leadin from the water jacket to the heatlng cham er, a pipe leading from the heating chamber to thewater heater, a valve in the supply pi e, a valve in said branch, and an -addltlona' pipe leading from the heating chamber atthe lower end of the water heater for afi'ording an additional circuit for the water.

10. A cofl'ee urn having three com-partments,one above the other, the upper compartment for the storage of hot Water, the lower compartment having a coffee reservoir, and the middle compartment having a receptacle for cofl'ee being removable an the urn having a door in the side. through which the cofi'ee' receptacle may be withdrawn without interfering I with the upper or lower compartments, there being also a spray nozzle in the middle compartment for spraying water onto the cofi'ee grounds, and connections between the upper c mpartment and the spray nozzle.

11. A cofiee urn having three compartments, one above the other, the up er compartment for storage of hot water, t elower compartment having a cofi'ee reservoir and an enclosing water jacket, and the middle compartment having a receptacle for cofiee rounds, a spray nozzle and connections for eadingwater from the upper compartment to the spray nozzle for spraying the coffee, a heater for the water, and pipe connections leading from the heater to the up-per'compartment'and from the upper compartment to the water jacket, and from the water jacket back to the heater.

12. Acofl'ee urn having three compartments, one above the other, the upper com partment for storage of hot water, the lower (grounds, the receptacle compartment having a cofiee reservoir and an enclosing water jacket, and the mlddle vcompartment having a receptacle for cofiee grounds, a spray nozzle and connections for eading water from the upper compartment to the spray nozzle for spraying the cofiee, a heater for the water, and pipe connections leading from the heater to the upper compartment and from the upper compartment to the water'jacket, and from the. water chamber in which a fresh charge of water,

may be stored for heating purposes while the liquid coffee is being dispensed, the heating chamber being connected to the water jacket,

a heater connected at its opposite ends to the heating chamber to thereby form a heating circuit, a cold water supply pipe connected to the heater and to the water jacket, and a valve for disconnecting the cold water supply from the jacket whereby at times' cold water may flow directly to the heater and to the water jacket and at other times the water jacket will be disconnected, there'- by enabling it to retain its heatwhile the heater is bringing a fresh charge of Water up to the desired temperature with the aid 0 said heating circuit;

14. A cofi'ee urn having a liquid cofiee reservoir, a water jacket therefor, a heating chamber, a heater, and two independent water circuits arranged in parallel and including the heater as a duet common to both circuits, one of the circuits including the heating chamber and the water jacket.

15. A cofi'ee urn having a liquid cofi'ee reservoir, a water jacket therefor, a heating chamber, a heater, two independent water circuits arranged in parallel and including the heater as a duct common to both circuits,

'ently of each other.

In witness whereof, I have hereunto subscribed my name.

ouis K. SCHWALL. 

